When expiring a contact mechanism, an incorrect error is displayed. This is mostly an error due to code reuse. There is no reason to redirect back to editcontactmech, instead just redirect to viewprofile. See attached patch.
"The contact information specified does not belong to you, you may not view or edit it."
1) Login to http://demo-stable-ofbiz.apache.org/ecommerce/control/main as DemoCustomer.
2) Navigate to http://demo-stable-ofbiz.apache.org/ecommerce/control/viewprofile
3) Click Expire next to one of the Postal Addresses.